Kinetic and mechanistic study on oxidation of 1- Phenyl ethanol by polymer supported Cr (VI) A free radical intervention

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The reaction of 1- phenyl ethanol was found to proceed through ester formation. The ester thus decomposes in a slow step to produce chromium (IV).Since our oxidant was supported on Ambersep 900 (OH- ) , the intermediate chromium (IV) will further oxidize another molecule of 1- phenyl ethanol generating a free radical in a fast step. The free radical subsequently reacts with another oxidant site in the polymeric reagent in a fast step leading to the formation of chromium (V).The intermediate chromium(V) in the last step reacts with 1- phenyl ethanol to produce acetophenone. There is no evidence of any systematic investigation in the literature on the kinetics of 1- phenyl ethanol by polymer supported chromic acid. Hence, the present work is undertaken with a view to seek the reaction kinetics and the activation parameters have been computed with respect to the slow step.

Kinetics; mechanistic; 1-phenyl ethanol; polymer supported; free radical; oxidation